kernel.cpp


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74

#include "acpi.hpp"
#include "gdt.hpp"
#include "idt.hpp"
#include "keyboard.hpp"
#include "memory.hpp"
#include "multiboot.hpp"
#include "pic.hpp"
#include "pit.hpp"
#include "portio.hpp"
#include "tasking.hpp"
#include "vgaterminal.hpp"

static VGATerminal vga;
TextOutput& term = vga;

static volatile bool termBusy = false;

void kernel_main(void) 
{
    term.write("Clyne's kernel, v2024\n\n");

    if (!multiboot_initialize())
        for (;;);

    idt_register_callback(14, [](auto& regs) {
        term.write("Page fault! eip=");
        term.write(regs.eip);
        term.write('\n');
        for (;;);
    });

    acpi_initialize();
    memory_initialize();
    gdt_initialize();
    pic_initialize();
    idt_initialize();
    pit_initialize();
    keyboard_initialize();
    asm volatile("sti");
    tasking_initialize();
    term.write("Tasking enabled.\n");

    //tasking_spawn([] {
    //    for (;;) {
    //        do pit_delay_ms(1);
    //        while (termBusy);

    //        termBusy = true;
    //        term.write('B');
    //        termBusy = false;
    //    }
    //}, 256);

    //tasking_spawn([] {
    //    for (;;) {
    //        do pit_delay_ms(1);
    //        while (termBusy);

    //        termBusy = true;
    //        term.write('C');
    //        termBusy = false;
    //    }
    //}, 256);

    for (;;) {
        pit_delay_ms(100);
        //while (termBusy);

        //termBusy = true;
        //term.write('A');
        //termBusy = false;
    }
}